Results 211 to 220 of about 44,132 (307)

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source

Comparative analysis of refractive errors and ocular biological parameters among pre-myopic adolescents across different age groups and geographical regions. [PDF]

Sci Rep
Chen S, Yao L, Wang X, Zhao C, Tang Y, Wang Y, Zou Z, Liu Y, Qi L.   +8 more
europepmc   +1 more source

Hierarchical Twist: Chirality Across Scales in Cellulose Cholesterics

Advanced Optical Materials, EarlyView.
Hierarchical left‐ and right‐handed chiral nematic structures are observed in a solvent‐free thermotropic cellulose derivative. Free‐standing films show hierarchical twisted structures whose pitches respond differently to uniaxial strain: left‐handed pitches increase, ones decrease.
N. Monge, L.F.V. Pinto, E. Ferreira, P.L. Almeida, J.L. Figueirinhas, A.L. Carvalho, P.J. Sebastião, M.H. Godinho   +7 more
wiley   +1 more source

Exploring the Link: A Systematic Review and Meta-Analysis on the Prevalence and Association Between Refractive Errors and Intermittent Exotropia. [PDF]

Health Sci Rep
Mohammad NK, Rajab IA, Mutar MT, Ismail M.   +3 more
europepmc   +1 more source

Ferroelectric Fluids for Nonlinear Photonics: Evaluation of Temperature Dependence of Second‐Order Susceptibilities

Advanced Optical Materials, EarlyView.
Nonlinear optical susceptibilities of five different materials that exhibit the ferroelectric nematic phase, as well as smectic A ferroelectric phase, are determined. The materials investigated include archetypal molecular architectures as well as mixtures showing room‐temperature ferroelectric phases.
Matija Lovšin, Luka Cmok, Calum J. Gibb, Jordan Hobbs, Richard J. Mandle, Alenka Mertelj, Irena Drevenšek‐Olenik, Nerea Sebastián   +7 more
wiley   +1 more source

Prevalence and Distribution of Refractive Errors among School-going Adolescents: A Retrospective Analysis from Madhya Pradesh, India. [PDF]

Indian J Community Med
Kawache KA, Zode MY, Basu S.
europepmc   +1 more source

Room‐Temperature, Photo‐Densified High Refractive Index Titanium Oxide Thin Films for Solution‐Processed Flexible Bragg Mirrors and Microcavity OLEDs

Advanced Optical Materials, EarlyView.
This paper presents the room‐temperature fabrication of solution‐processed, high refractive index TiOX thin films via photo‐densification. Using these films, flexible Bragg mirrors are demonstrated on PET substrates, achieving a high reflectivity of 96% at 450 nm.
Ayumu Nagaoka, He Sun, Luyang Song, Lina Yoshida, Tsukasa Yoshida, Yoshiyuki Suzuri   +5 more
wiley   +1 more source

Changes in the thickness of the crystalline lens components before and after cycloplegia in children with different refractive errors. [PDF]

J Optom
Bao Y, Zhang Z, Cao J, Ma Y, Yu Y, Wang Z, Niu L, Wang X, Zhou X, Huang J, Zhao J.   +10 more
europepmc   +1 more source

From Brittle to Flexible: Influence of Glucose‐Based Additives on Cellulose Nanocrystal Self‐Assembly in Suspension and Dried Photonic Films

Advanced Optical Materials, EarlyView.
Cellulose nanocrystals (CNCs) self‐assemble in aqueous suspension into chiral nematic liquid crystals, resulting in structurally colored films upon drying. Here, the influence of sugar additives on CNC self‐assembly in suspension and in films are studied.
Buse Tatli, Alexandra R. Rousseau, Wenkui Xing, Matteo Hirsch, Emily D. Cranston, Tiffany Abitbol   +5 more
wiley   +1 more source

Knowledge, attitudes and practice toward refractive errors management among left-behind children of migrant workers. [PDF]

Front Public Health
Liu S, Yang G, Li Q, Pei R, Tang S.
europepmc   +1 more source